diff --git a/dtos/autoevent.go b/dtos/autoevent.go
index ca3dd090..82c42bc3 100644
--- a/dtos/autoevent.go
+++ b/dtos/autoevent.go
@@ -1,5 +1,6 @@
 //
 // Copyright (C) 2020-2023 IOTech Ltd
+// Copyright (C) 2025 IOTech Ltd
 //
 // SPDX-License-Identifier: Apache-2.0
 
@@ -10,10 +11,17 @@ import (
 )
 
 type AutoEvent struct {
-	Interval          string  `json:"interval" yaml:"interval" validate:"required,edgex-dto-duration=1ms"` // min/max can be defined as params, ex. edgex-dto-duration=10ms0x2C24h
-	OnChange          bool    `json:"onChange" yaml:"onChange"`
-	OnChangeThreshold float64 `json:"onChangeThreshold" yaml:"onChangeThreshold" validate:"gte=0"`
-	SourceName        string  `json:"sourceName" yaml:"sourceName" validate:"required"`
+	Interval          string    `json:"interval" yaml:"interval" validate:"required,edgex-dto-duration=1ms"` // min/max can be defined as params, ex. edgex-dto-duration=10ms0x2C24h
+	OnChange          bool      `json:"onChange" yaml:"onChange"`
+	OnChangeThreshold float64   `json:"onChangeThreshold" yaml:"onChangeThreshold" validate:"gte=0"`
+	SourceName        string    `json:"sourceName" yaml:"sourceName" validate:"required"`
+	Retention         Retention `json:"retention" yaml:"retention" validate:"omitempty"`
+}
+
+type Retention struct {
+	MaxCap   int64  `json:"maxCap" yaml:"maxCap"`
+	MinCap   int64  `json:"minCap" yaml:"minCap"`
+	Duration string `json:"duration" yaml:"duration" validate:"edgex-dto-duration=0s"`
 }
 
 // ToAutoEventModel transforms the AutoEvent DTO to the AutoEvent model
@@ -23,6 +31,11 @@ func ToAutoEventModel(a AutoEvent) models.AutoEvent {
 		OnChange:          a.OnChange,
 		OnChangeThreshold: a.OnChangeThreshold,
 		SourceName:        a.SourceName,
+		Retention: models.Retention{
+			MaxCap:   a.Retention.MaxCap,
+			MinCap:   a.Retention.MinCap,
+			Duration: a.Retention.Duration,
+		},
 	}
 }
 
@@ -42,6 +55,11 @@ func FromAutoEventModelToDTO(a models.AutoEvent) AutoEvent {
 		OnChange:          a.OnChange,
 		OnChangeThreshold: a.OnChangeThreshold,
 		SourceName:        a.SourceName,
+		Retention: Retention{
+			MaxCap:   a.Retention.MaxCap,
+			MinCap:   a.Retention.MinCap,
+			Duration: a.Retention.Duration,
+		},
 	}
 }
 
diff --git a/models/autoevent.go b/models/autoevent.go
index 51a7b98a..61c117fa 100644
--- a/models/autoevent.go
+++ b/models/autoevent.go
@@ -1,5 +1,6 @@
 //
 // Copyright (C) 2020-2021 IOTech Ltd
+// Copyright (C) 2025 IOTech Ltd
 //
 // SPDX-License-Identifier: Apache-2.0
 
@@ -10,4 +11,11 @@ type AutoEvent struct {
 	OnChange          bool
 	OnChangeThreshold float64
 	SourceName        string
+	Retention         Retention
+}
+
+type Retention struct {
+	MaxCap   int64
+	MinCap   int64
+	Duration string
 }